Milking-machine.



PATENTED MAR. 14, 1905.

BURRELL L MILKING MACHINE.

APPLICATION FILED MAY 13 1904 4 SHEETS-SHEET 1.

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L. BURRELL. MILKING MACHINE.

APPLICATION FILED MAY 13, 1904.

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PATENTED MAR. 14, 1905.

L. BURRELL. MILKING MACHINE.

APPLICATION FILED HAY 13,1904.

4 BHEETSSHEET 4.

w 13301422202". 1f Zia 7% e515 Patented March 14, 1905 UNITED STATES PATENT ()EEICE.

LOOMIS BURRELL, OF LITTLEFALL S, NEW YORK, ASSIGNOR TO D.-H. BURRELL & COMPANY, OF LITTLEFALLS, NEXV YORK.

IVllLKlNG-IVIACHINE.

SPECIFICATION forming part of Letters Patent No. 784,780, dated March 14, 1905.

Application filed May 13, 1904. Serial No. 207,7 i4.

To all 7.1;71/0772/ it may cmwcrn:

Be it known that I, Looms BURRELL, a citi- Zen of the United States, and a resident of Littlefalls, in the county of Herkimer and State of New York,have invented new and useful improvements in hlilking-h Iachinespf which the following is a specification.

This invention relates to that class of pneumatic milking-machines which are provided with teat-cups having an inner flexible wall or lining in which the teats are received and to which the suction is applied intermittently or by pulsations.

The main objects of the invention are to render machines of this character more practical and efficient than heretofore by producing sharper and more eflicient air-pulsations,

by producing pulsations simultaneously inside and outside the flexible linings, by producing a positive and effective movement of the flexible lining inwardly and outwardly or toward and from the teats, by applying external air-pressure to the outside of the lining at the same time that the suction is applied to the interior thereof, thereby producing a squeezing and a sucking action simultaneously, and to provide means for admitting air to the pipes in proximity to the cups for quickly relieving the vacuum therein when the suction is cut off from these pipes.

In the accompanying drawings, consisting of four sheets, Figure 1 is an elevation of a milkingmachine embodying this invention and showing one set of teat-cups connected with the pulsator. Fig. 2 is a perspective view of the teat-cup connector. Fig.3 is a horizontal section of the pulsator in line 3 3, Fig. 1, on an enlarged scale. Fig. 4 is a vertical section in line 4: 4, Fig. 3. Fig. 5 is a fragmentary vertical section in line 5 5, Fig. 7. Fig. 6 is a similar section in line 6 6, Fig. 8. Fig. 7 is partly a horizontal section through the pulsator in line 7 7, Fig. 4, and partly a vertical section through the teat-cup connector and one of the teat-cups, showing the parts in the position in which the suction is applied to the interior of the linings. Fig. 8 is a similar view showing the parts in the position in which the suction is cut off from the interior of the linings. Fig. 9 is a fragmentary sectional view of the connector, showing the air-inlet valve closed. Fig. 10 is a similar view showing this valve open. Fig. 11 is a fragmentary vertical section through the reversing-valve of the pulsator and connecting parts in line 11 11, Fig. .3. Figs. 12 and 13 are vertical sections, on an enlarged scale, showing the reversing-valve in different positions. Fig. 14 is an elevation, partly in section, of the reversing mechanism of the reversing valve. Fig. 15 is a similar view showing a different position of the reversing mechanism. Fig. 16 is a horizontal section in line 16 16, Fig. 1%. Fig. 17 is a horizontal section in line 17 1'7, Fig. 15. Fig. 18 is a fragmentary elevation of the lower portion of the valve-reversin g mechanism,showing the same in a different position.

Like letters of reference refer to like parts in the several figures.

A represents the milk pail or receptacle upon which the pulsator B is mounted in any suitable manner. 7

(0 represents the flexible main milk-pipe through which the milk flows to the pulsator and thence to the milk-pail.

6 represents the flexible main air-pipe, which is also connected with the pulsator and which receives no milk.

0 represents the connector or coupling. which is arranged near the teat-cups l) and which connects the main milk-pipe a and main air-pipe?) with the flexible branch milk-pi pes a and flexible branch airpipes 6, extending from the connector up to the cups. The branch milk-pipes a are arranged on one side the milk side o'f the connector, to which side the main milk-pipe a is attached, and the branch air-pipes b are arranged on the opposite sidethe air side of the connector.

The main milk-pipe, main air-pipe, connector, branch pipes, and cups are preferably duplicated for each pail and pulsator, so that the latter can be connected with two cows at the same time.

The pulsator is constructed as follows: B represents the base-plate of the pulsator, which plate rests detachably and tightly, preferably f of the cylinder.

by means of a rubber packing-ring 77, Fig. 4, upon the top of the pail. Z) is the nipple on this plate, to which the suction-pipe b is applied, which connects the pail with the usual vacuum-pump or exhaust apparatus.

E represents an upright cylinder or valvecasing formed on or secured centrally to the plate B and containing a piston-valve F, on the under side of which the partial vacuum in the pail acts. A rod 5 extends upwardly from the valve to a flexible diaphragm G, which forms the bottom of an. exhaust-chamber g, mounted on a casing which rises from the cylinder E. The casing g is provided with openings 9" or is otherwise so formed that the pressure of the atmosphere acts against the under side of the diaphragm and the upper side of the piston-valve. The partial vacuum in the pail acts constantly on this valve and causes the same to move downwardly except when this downward pressure is overcome by the greater upward pressure which is exerted by the atmosphere against the diaphragm when the same suction is applied to the suction-chamber above the diaphragm, the latter being for that purpose sufficiently larger in area than the piston-valve.

The piston-valve F is provided with a bore or cavity f, which is closed at the top and opens downwardly and into which the mill;- ports f and the air-exhaust ports f open, Figs. 4: to 8. These ports are duplicated to connect with the milk-ports f and air-ports The milk-ports f of the cylinder communicate with the rigid milkpipes f which extend horizontally over the base-plate of the pulsator and carry eocksf at their outer ends, to which the flexible milkpipes a. are connected. In like manner the air-ports f" of the cylinder connect with rigid air-pipesf, which are connected by cocks f with the flexible air-pipes 7).-

The milk-ports f and air-ports f of the cylinder or valve-casing are arranged in the same horizontal plane, while the milk-ports f of the valve are arranged at a higher level than that of the air-exhaust ports f thereof, so that in the lower position of the valve (shown in Figs. 5 and 7) the milk-ports of the valve register with the milk-ports of the cylinder and the main milk-pipes, while the air-exhaust ports of the valve are out of register. In the raised position of the valve (shown in Figs. 6 and 8) the air-exhaust ports of the valve are in register with the air-ports of the cylinder and with the main air-pipes and connect these air-pipes with the exhausted interior of the milk-pail.

The piston-valve F is further provided with an air relief or inlet port f, which enters from the top and opens at the side at the level of the milk-ports f of the valve. This reliefport divides into two branches, as shown in Fig. 7, which register with the air-ports of the cylinder when the valve is in its lower position and the milk-ports of the valve register with the milk-pipes. When the valve is in its raised position, Fig. 6, this relief-port is closed at its lower end. WVhen the valve is in its lower position, Figs. 5 and 7, this relief-port is in register with the air-portsf" of the cylinder and admits outside air to the airpipes.

Each milk-pipe f" is preferably formed by a glass tube, which is fitted at its inner end against a rubber washer f in a boss f on the valve-cylinder and at its outer end against a rubber washer f in a boss f, which is formed on the base-plate of the pulsator and into which the eockf is screwed. This transparent pipe enables the operator to observe the flow of the milk, and as the pipes are straight they can be readily cleaned.

The exhaust-chamber 9 above the diaphragm G is alternately placed in comm unication with the exhausted interior of the pail or with the external air by means of a valve H, which is preferably constructed and arranged as follows:

The valve is arranged flatwise upon the base-plate of the pulsator above a port it, which penetrates the base-plate and opens into the pail, and a port kl, which also penetrates the plate, but is connected on the under side of the plate with a horizontal pipe or passage if, Figs. 1143, which communicates with the exhaust-chamber g by an ascending pipe 7L3 and passage 7t", Figs. 3 and L. The ascending pipe is preferably provided with a handscrew 7t or some other suitable device for regulating the size of the opening.

The valve is provided in its under side with an exhaust-cavity 7t, by which the ports 71, A can be placed in communication, as shown in Fig. 13, in which position .of the valve the exhaust applied to the pail is also applied to the exhaust-chamber g, thereby causing the diaphragm Gr to be drawn upwardly and the piston-valve F to be raised. The valve is further provided with an air-port 7L7, which penetrates the valve and which when in register with the port /i of the plate, as shown in Fig. 12, admits the external air to this port and through the same and the connecting-passages to the diaphragm g, thereby allowing the diaphragm to descend under the suction applied to the piston-valve.

The reversing-valve H is mounted to oscillate on a Vertical pivot 71), Figs. 3, 7, and 8, 14: and 15, and its movement is limited by arms h on the valve and an intermediate step it on the base-plate. This reversing-valve is shifted periodically by mechanism from the piston-valve F. While the piston-valve is moving downwardly the air-port of the reversing-valve is in register with the port it and admits the external air to the diaphragmchamber 9, Figs. 3 and 7. WVhen the pistonvalve has reached the limit of its downward movement, the reversing-valve is reversed IIO from the position shown in Figs. 3 and 7 to the position shown in Fig. 8. In this position the air-port of the reversing-valve is closed and the exhaust is connected withthe diaphragm-chamber through the exhaust-cavity of the reversing-valve. The piston-valve is now moved upwardly by the diaphragm until the limit of the upward movement is reached, when the reversing-valve is again reversed.

The mechanism by which the up-and-down movement of the piston-valve is transmitted to the reversing-valve for reversing the same preferably contains a spring which is gradually strained or deflected by the movement of the piston-valve and which is released by an escape mechanism to become active when the movement of the piston valve has nearly reached the desired limit and then acts with full force upon the reversing-valve for shifting the same, so that the force created by the slow movement of the piston-valve is stored up in the spring and then applied suddenly to the valve, whereby the shifting of the reversing-valve is effected quickly and with certainty notwithstanding the slow movement of the piston-valve. This valve-shifting mechanism is preferably constructed as follows, Figs. 3, 7, 8, 14 to 18: I is a horizontal arm which is secured to the rod 9 of the piston-valve in the casing g and t' is a bar which extends downwardly from the arm I on the outer side of the valve-cylinder E and connects at its lower end by a pin 2 and slot i or other suitable means with one end of a vertically-oscillating reversing-lever 1. The latter is pivoted at 2" to a standard 71*, which is secured to the base-plate of the pulsator. l is a valvelever which is pivoted intermediate its ends to the standard 71" and which is operated from the reversing-lever l by a bar-spring 17". This spring is secured at its lower end to the reversing-lever by a bracket 7:" or other suitable means and is slidably connected with the upper arm 6 of the valve-lever 1, preferably by engaging between two'lugs i on the lever. The locking or free end of the reversing-lever is arranged adjacent to the lower arm 21 of the valve-lever and is provided on its front side with a locking-lug i, which engages in the normal position of the reversing-lever against one or the other side of a stop-pin 7: on the valve-lever. When the bar Jis moved downwardly by the piston-valve, the opposite or locking arm of the reversing-lever movesupwardly. In this position of the parts the locking-lug on the locking-arm of the reversing-lever bears against the outer side of the pin i on the valve-lever, as shown in Fig. 15, and prevents movement of the valvelever until the locking-arm has moved upwardly far enough to cause the locking-lug to clear the locking-pin. During this'movement of the reversing-lever the spring is bent and strained and when the locking-lug has finally cleared the locking-pin the tension of the spring quickly shifts the valve-lever and reverses the valve, as shown in Fig. let. The bar 2' is now moved upwardly, and the downward movement of the locking-arm of the reversing-lever places the lug on the inner side of the pin and prevents the valve-lever from moving under the pressure of the spring until the lug has passed below the pin. The spring has now been strained and when the valve-lever is released by the lug on the reversing-lever passing below the pin on the valve-lever the latter is shifted by the tension of the spring and the valve is again reversed. The lower end of the valve-lever engages between arms or jaws 21 on the valve, as represented in Figs. 3, 7, and 16. This mechanism for shifting the valve is very satisfactory and is preferred; but other means for effecting this result may be employed.

The teat-cups D, as stated, are of the kind in which an inner flexible lining (Z is combined with a rigid inclosing shell d. The suction is applied alternately to the inner compartment formed within the flexible lining and the outer compartment formed between the flexible lining and the rigid shell. A flexible mouthpiece (Z of well-known construction is arranged in the top of each cup to make a close connection with the teat. of each cup is provided with a nipple (Z for connection with the branch milk-pipe a, and the upper portion of each cup is provided at the side with an oblique nipple d" for connection with the branch air-pipe I). As shown in the drawings, the rigid shell of the cup is composed of an upper and a lower part connected by a screw-coupling (Z but other constructions may be employed.

The connector C is not only a manifold coupling for connecting the four branch milkpipes and four branch air-pipes with the main milk-pipe and the main air-pipe, respectively, but also a device for admitting the external air automatically to the branch milk-pipes for relieving the partial vacuum therein when the suction is cut off from the main milk-pipe by the piston-valve. This connector is constructed as follows, Figs. 1,2, 7 to 10: The connector consists of a tubular milk-passage la, a tubular air-passage Z, and an intermediate valve-chamber m. The milk-passage]; is connected at its open outer end with the main milk-pipe a and is provided with four nipples 7:, to which the branch milk-pipes are connected. The air-passage Z is curved at its outer end and similarly connected at its outer end with the main air-pipe I) and is provided with four nipples, to which the branch airpipes Z/ are connected. As hereinbefore stated, the branch milk-pipes connect with the nipples at the lower ends of the teat-cups and communicate with the internal compartment or space formed within the flexible lining, while the branch air-pipes connect with the The bottom 5 IIO external nipples at the upper portion of the cups and communicate with the external compartments or spaces formed between the linings and the outer shells of the cups.

The valve-chamber m contains an air-inlet valve 12/, which divides the chamber into two parts, one communicating with the milk-passage Zr and the other with the air-passage Z. This valve is preferably al'lexible diaphragm, which seats itself against a seat wa arranged around an opening 412.", leading to the milkpassage. The valve-chamber is provided on the same side with an air-inlet orifice 911/, through which the external air enters the valve-chamber and passes to the milk-passage when the valve is raised from its seat. The valve is held yieldingly against its seat by a spring a, which is, however, not so strong that it cannot be overcome by the air-pressure when the suction is applied to the air-passage Z. The valve-diaphragm is preferably provided on its back with a plate a and stem 11. to which the spring is applied. The valvechamber is preferably formed of two parts, between which the diaphragm is clamped and which are secured together by screws 0 or other fastenings.

When the suction is applied to the milkpipes and through the same to the interior of the cup-linings and the air is admitted to the air-pipes, the valve m closes and prevents the entrance of air to the milk-pipes. hen the suction is applied to the air-pipes and through the same to the exterior of the cup-linings, the valve on. opens and admits air to the milk-pipes and the interior of the cup-linings. The valve is in this manner opened and closed automatically by the pulsations in the air-pipe,

The pulsator is preferably provided with the usual handle P, having its uprights 7) secured at their lower ends to the base-plate and curled at their upper ends to form supports 7) for the fiexible pipes in carrying the pulsator from place to place.

The operation of the apparatus is as follows: Suction being applied to the milk pail or vessel, the piston-valve moves slowly up and down in its cylinder and produces pulsations in the milk and air tubes connected therewith. These pulsations take place in such manner that when the suction is applied to the milkpipes and through the same to the internal compartments or internal spaces of the fiexible linings of the teat-cups the external air is admitted to the air-pipes and through the same to the external compartments of the teatcups outside of the linings, thereby applying the suction to the teats within the linings and at the same time applying external air-pressure to the outer sides of the linings. in this manner the teats are squeezed at the same time that the suction is applied to the same. \Vhen the suction is cut ofl' from the milk-pipes and the internal space of the cup-linings, the suction is applied to the air-pipes and the outer l sides of the cup-linings, whereby the linings are drawn away from the teats against the shells of the cups, and the teats are allowed to hang nearly free in the cups. The vacuum in the linings is relieved quickly when the suction is cut off by the air entering the milkpipes through the connector. In this manner pulsations are produced simultaneously inside and outside of the cup-linings, the operation alternating in such manner that when the suction is applied to the interior of the lining to draw the milk from the teats the external air is admitted to the exterior of the lining to squeeze the teats, and when the suction is applied to the exterior of the linings to draw the latter away from the teats the external air is admitted to. the interior of the linings to break the vacuum therein and quickly relieve the teats from the suction. The linings are in this manner positively moved both inwardly and outwardly, and sharp and effective pulsations are produced. hen the suction has been relieved on the milk-pipes and the lining has been drawn away from the teat, the cup nevertheless stays on the teat, partly because a slight vacuum remains in the interior space of the lining and partly because the flexible mouthpiece of the cup holds the latter on the teat after the cup has once been drawn up to place thereon.

The pulsations are transmitted to the connector and cups as follows: During the time that the milk-ports f of the pistonvalve register with the milk-ports f of the cylinder, which occurs while the piston-valve travels toward its lower position and is in this position. the suction in the pail is applied through these ports to the fixed milk-pipe f", main milk-pipe a, milk-passage 7': of the connector, and branch milk-pipes a, as indicated in Fig. 7, and the milk flows through these pipes, passages, and ports to the pail. At the same time the external air is admitted to the exterior of the linings through the air-relief port f in the piston-valve, the cylinder airport f, the fixed air-pipef main air-pipe b, air-passage l of the connector, and branch air-pipes b, as indicated in the same figure.

During the time that the suction is cut off from the milk-pipes by the pistonvalve and the air-suction port f" of the latter is in communication with the air-pipes, as indicated in Fig.9, which occurs while the pistonvalve travels toward its uppermost position and is in said position, the suction in the pail is applied through the air-exhaust port cylinder-portf, fixed air-pipef, main airpipe I), air-passage l of the connector, and branch air-pipes 7/ to the exterior of the cuplinings. At the same time the external air is admitted to the milk-passage 715 of the connector and the milk-pipes connected therewith by the valve of the connector.

By admitting the air for the relief of the vacuum in the branch milk-pipes near the cups the vacuum is quickly relieved in the teat-space of the cups, the surging of the milk in the main milk-pipes, which are of considerable length, is avoided, and the construction is improved because pipes of comparatively small size can be used.

The reciprocating movement of the pistonvalve is preferably effected, as shown and described, by a reversing-valve and an exhaustchamber and diaphragm in connection with the suction applied to the pail; but other devices or mechanisms may be applied for the purpose.

I claim as my invention 1. The combination of a teat-cup having a movable inner wall, an air-chamber outside said wall and a milk-chamber inside said wall, and means for producing alternating vacuum pulsations in both of said chambers, substantially as set forth.

2. The combination of a teat-cup having a movable inner wall, an air-chamber outside said wall and a milk-chamber inside said wall, means for producing alternating vacuum pulsations in both of said chambers, and means for alternately admitting air to said chambers, substantially as set forth.

3. The combination of a teat-cup having a movable inner wall, an air-chamber outside said wall and a milk-chamber inside said wall, means for producing vacuum pulsations in said air-chamber, and an automatic air-inlet valve which is opened by suction applied to the air-chamber and admits air to the milkchamber, substantially as set forth.

4. The combination of a teat-cup having a movable inner wall, an air-chamber outside said wall and a milk-chamber inside said wall, means for producing alternating vacuum pulsations in both of said chambers, and an automatic air-inlet valve which is opened by suction applied to the air-chamber and admits air to the milk-chamber, substantially as set forth.

5. The combination of a teat-cup having a movable inner wall and an air-chamber outside said wall, an air-passage connected with said outer chamber, a milk-passage connected with the chamber within said movable wall, an exhausting means, and a pulsator which places the exhausting means alternately in communication with said inner and outer chambers, therebyproducing alternating vacuum pulsations in both chambers, substantially as set forth.

6. The combination ofa teat-cup having a movable inner wall and an air-chamber outside said wall, an air-passage connected with said outer chamber, a milk-passage connected with the chamber within said movable wall, an exhausting means, and a pulsator which places the exhausting means alternately in communication with said inner and outer chambers, thereby producing alternating vacuum pulsations in both chambers, and

thereby producing alternating vacuum pulsa tions in both chambers, and which is provided with an air-inlet which admits air to the airpassage and outer chamber when it applies the exhaust to the milk-passage, and air-inlet means separate from said pulsator for admitting air to the milk-passage when the exhaust is cut off from the same by the pulsator, substantially as set forth.

8. The combination of a teat-cup having a movable inner wall and an air-chamber outside said wall, an ainpassage connected with said outer chamber, a milk-passage connected with the interior of said inner wall, and a pulsator-valve connected with said air and milk passages and having a milk-port, an air-exhaust port and an air-inlet port, said ports being so arranged that either said milk-port and said air-inlet port are in register with said milk-passage and said air-passage, respectively, or said air-exhaust port is in register with said air-passage and said milk-port is closed, substantially as set forth.

9. The combination of a teat-cup having a movable inner wall and an air-chamber outside of said wall, an air-passage connected with said outer chamber, a milk-passage connected with the interior of said movable wall, a pulsator which admits air to said air-passage and simultaneously applies suction to said milki passage and which alternately applies suction to said air-passage and cuts off the suction from said milk-passage and the interior of said movable wall, and means for admitting air to said milk-passage when the suction'is cut off from the same, substantially as set forth.

10. The combination of a teat-cup having a movable inner wall and an air-chamber outside said wall, an air-passage connected with said outer chamber, a milk-passage connected with the chamber within said movable wall, an exhausting means, and a pulsator having a valve-casing which is connected with said exhausting means and providedwith a milk-port and an air-port, and a reciprocatingvalve arranged in said casing and provided with a milk-port, an air-exhaust port and an air-inlet port, said air-exhaust port and air-inlet port being adapted to register alternately with the air-port of the valve-casing, substantially as set forth.

11. The combination of a millereceptacle, means for exhausting the same, a pulsator having an upright valve-cylinder which opens at its lower end into said receptacle, a pulsatorvalve arranged to move up and down in said cylinder and exposed to the suction in the re ceptacle,whereby the valve is caused to move downwardly, and means for moving the valve upwardly, substantially as set forth.

12. The combination of a milk-receptacle, means for exhausting the same, a pulsator having an upright valve-cylimler which opens at its lower end into said receptacle, and a pulsator-valve arranged to move up and down in said cylinder and exposed to the suction in the receptacle, whereby the valve is caused to move downwardly, said valve being provided with a milk-port, an air-exhaust port, and an air-inlet port, substantially as set forth.

13. The combination of a milk-receptacle, means for exhausting the same, a pulsator having an upright valve-cylinder which is open at its upper end to the atmosphere and communicates at its lower end with the milk-receptacle, said cylinder having a milk-port and an air-port in its side, and a pulsator-valve in said cylinder having a milk-port adapted to register with the milk-port of the cylinder and opening through the lower end of the valve, an air-exhaust port adapted to register with the air port of the cylinder and opening through the lower end of the valve, and an air-inlet port adapted to register with the air-port of the cylinder and opening to the atmosphere through the upper end of the valve, substantially as set forth.

14. The combination of a teat-cup, an exhausting means, and a pulsator havingavalvecasing open at one end to the atmosphere and at the other end to the exhausting means, a reciprocating pulsator-valve arranged in said casing, an exhaust-chamber provided with a movable member which is connected with said valve for moving the same in one direction, and means for alternately connecting said exhaust-chamber with the exhausting means or with the atmosphere, substantially as set forth.

15. The combination of a milk-receptacle,

means for exhausting the same, a pulsator having a valve-casing which is open at one end to the atmosphere and at the other end to the receptacle, a reciprocating pulsatorvalve arranged in said casing, an exhaustchamber provided with a movable member which is connected with said valve for moving the same in one direction, and means for alternately connecting said exhaust-chamber with said milk-receptacle or with the atmosphere, substantially as set forth.

16. The combination of a milk-receptacle, means for exhausting the same, apulsator having a valve-casing which is open at its lower end to the receptacle and at its upper end to the atmosphere, a piston-valve adapted to move up and down in said casing and exposed to the suction in said receptacle, an exhaust-chamber arranged above said valve and provided with a movable member which is connected with said valve for raising the same, and means for alternately applying suction or admitting air to said exhaust-chamber, substai'ltially as set forth.

17. The combination-of a milk-receptacle, means for exhausting the same, a pulsator having a valve-casing which is open at its lower end to the receptacle and at its upper end to the atmosphere, a piston-valveadapted to move up and down in said casing and exposed to the suction in said receptacle, an exhaust-chamber arranged above said valve and provided with a movable member which is connected with said valve for raising the same, and a reversing-valve by which said exhaustchamber is alternately connected with said receptacle or with the atmosphere, substantially as set forth. i

18. The combination of a teat-cup, an exhausting means, and a pulsator havingavalvecasing open at one end to the exhausting means and at the other to the atmosphere, a piston-valve adapted to reciprocate in said casing and exposed to the suction created by the exhausting means, an exhaust-chamber provided with a movable member which is connected with the valvefor moving the same in one direction, a reversing-valve by which the exhaust-chamber is alternately connected with the exhausting means or with the atmosphere, and a spring reversing mechanism which is operated by said reciprocating pulsator-valve and which shifts said reversingvalve at the end of the stroke of said pulsatorvalve, substantially as set forth.

19. The combination of a milk-receptacle, means for exhausting the same, a pulsator having a valve-casing which is open at its lower end to the receptacle and at its-upper end to the atmosphere, a piston-valve adapted to move up and down in said casing and exposed to the suction in said receptacle, an exhaustchamber arranged above said valve and provided with a movable member which is connected with said valve for raising the same, a reversing-valve by which said exhaust-chamber is alternately connected with said receptacle or with the atmosphere, and aspring reversing mechanism which is operated by said reciprocating pulsator-valve and which shifts said reversing-valve at the end of the stroke of said pulsatorvalve, substantially as set forth.

20. The combination of a milk-receptacle, means for exhausting the same, a pulsator having a valve-easing which is open at one end to the atmosphere and at the other end to the receptacle, a reciprocating pulsator-valve arranged in said casing, an exhaust-chamber provided with a movable member which is connected with said valve for moving the same in one direction, a conduit leading to said exhaust-chamber, and a reversing-valve which has an air-port and an exhaust-cavity and which alternately places said passage in communication with said receptacle or with the atmosphere, substantially as set forth.

21. The combination of a milk-receptacle, means for exhausting the same, a pulsatorhaving a valve-casing which is open at one end to the atmosphere and at the other end to the receptacle, a reciprocating pulsatorvalve arranged in said casing, an exhaust-chamber having a movable member which is connected with said valve, an exhaust-port leading to the milk-receptacle and a passage leading to the exhaust-chamber, said port and passage being arranged in the base-plate of the pulsator, a reversing-valve arranged on said base-plate over said port and passage and provided with an air-port and an exhaust-cavity, and means for shifting said reversing-valve from said pulsator-valve, substantially as set forth.

22. The combination of a milk-receptacle, means for exhausting the same, a pulsator having a base-plate applied to the same and provided with a valve-casing, a pulsator-valve arranged therein, an exhaust-chamber provided with a movable member which is connected with said valve, an oscillating reversing-valve arranged on said base-plate and controlling the admission of the exhaust and the external air to said exhaust-chamber, and means for oscillating said reversing-valve from said pulsator-valve, substantially as set forth.

23. The combination of a teat-cup, an exhausting means, and a pulsator comprising a valvecasing open at one end to the exhaust ing means and at the other to the atmosphere, a piston-valve adapted to reciprocate in said casing and exposed to the suction created by the exhausting means, an exhaust-chamberprovided with means for moving said pistonvalve, a reversing-valve by which the exhaust-chamber is alternately connected with the exhausting means or with the atmosphere, and connecting reversing mechanism composed of a reversing-lever which is oscillated from the reciprocating valve, a valve-lever connected with the reversing-valve, a springbar having opposite ends connected with said levers,'and escapement-stops on said levers, substantially as set forth.

24. The combination of teat-cups, a main milk-pipe, a connector interposed between the main milkpipe and teat-cu ps, anautomaticairinlet valve in said connector adapted to admit air to said milk-pipe and teat-cu ps, an air-pipe connected with said connector, and means for producing pulsations in said air-pipe, which pulsations control said air-inlet valve, substantiallyas set forth.

25. The combination of teat-cups provided with branch air and mill: pipes, a pulsator, a connector to which said branch pipes are connected, main air and milk pipes connected. with said connector, and an air-inlet valve in said connector whereby air is admitted to the milkpipes and which is controlled by the pulsations in the main air-pipe, substantially as set forth.

26. The combination of teat-cups, a main milk-pipe connected therewith, aconnector interposed between the main milk-pipe and the teat-cups, an automatic air-inlet valve in said connector which seats itself toward the milkpipe, an air-pipe which opens against the back of the valve, and means for producing pulsations in said airpipe, substantially as set forth.

27. The combination of teat-cups, branch milk-pipes and air-pipes connected therewith, a main air-pipe and a main milk-pipe, a connector interposed between said main pipes and branch pipes and comprising two passages, one connecting with the milk-pipes and the other with the air-pipes, and a valve-chamber and automatic air-inlet valve arranged between said two passages, substantially as set forth.

28. A teat cup connector comprising a valve-chamber, an air-inlet valve arranged therein, a milk-passage arranged on one side of said chamber and provided with a seat against which said valve closes, an air-inlet which is in communication with the milk-passage when the valve is open, and an air-passage which opens on the rear side of said valve, substan tially as set forth.

29. A teatcup connector comprising a valve-chamber, a diaphragm-valve arranged therein, a milk-passage arranged on one side of the valve and provided with a seat against which said valve closes, an air-inlet arranged in the chamber on the same side of the diap h ragmval ve, milk-pipe connections provided on said milk-passage, an air-passage opening into said valve-chamber on the opposite side or back of the diaphragm-valve, and air-pipe connections provided on said air-passage, substantially as set forth.

30. The combination of teat-cups, each having an outer air-chamber and an inner mill;- chamber, a milk-pipe and an air-pipe, means for exhausting said pipes, a connector interposed between said pipes and said teat-cups, and an automatic air-inlet valve in said connector which seats itself toward the milk-pipe and is opened by suction applied to the airpipe, substantially as set forth.

\Vitness my hand this 7th day of May, 190a.

LOOMIS BURRELL.

WVitnesses:

(JI-IASJB. DALZELL, F. A. LANE. 

